Question about the RTC of STM32F103

We're using RTC as a timer to wakeup STM32F103 from stop mode frequently, I'm quite confused on the descriptions in RM00081. what's the difference between RTC_IRQHandler and RTCAlarm_IRQHandler? If an alarm comes, both irq called? Is there a EXTI17_IRQHanlder?2. do I must clear all of EXTI_Line17, PWR_FLAG_WU, RTC_IT_ALR in some irq handler? what's the actual physical connection between the components that these registers reside on (plz help to explain based on Figure 179 in RM0008)?